It happens as late as in 4.1.6
On Wed, Aug 19, 2015 at 5:38 AM, Steve French <smfrench@xxxxxxxxx> wrote:
> What kernel version?
>
> On Wed, Aug 19, 2015 at 6:11 AM, Yale Zhang <yzhang1985@xxxxxxxxx> wrote:
>>
>> SMB developers/users,
>>
>> I'm experiencing a strange bottleneck when my files are mounted as SMB
>> 2.0. When I launch multiple processes in parallel for benchmarking,
>> only the 1st one starts, and the rest won't start until the 1st one
>> finishes:
>>
>> ---------------------------------------test
>> programs--------------------------------
>> #!/bin/sh
>> ./a.out&
>> ./a.out&
>> ./a.out&
>> wait
>>
>> a.out is just a C program like this:
>>
>> int main()
>> {
>> printf("greetings\n");
>> while (true);
>> return 0;
>> }
>>
>> Apparently, this only affects SMB 2.0. I tried it with SMB 2.1, SMB
>> 3.0, & SMB 3.02, and everything starts in parallel as expected.
>>
>> I'm assuming SMB 3 and especially SMB 2.1 would share a common
>> implementation. How could 2.0 have the problem but not 3? It almost
>> seems the bottleneck is a feature instead of a bug? 8(
>>
>> Can it still be fixed?
>>
>> -Yale
>> --
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>
>
>
>
> --
> Thanks,
>
> Steve
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